BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
 
DAILY DISCUSSION AND CLIMATE SUMMARY
THURSDAY, JANUARY 11, 2007  
ALL TIMES ARE IN EASTERN STANDARD TIME
 
Today's observations:
 
7 A.M.   
Weather: Scattered thin cirrus
Temperature: 17F, Dew point: 6F, Wind: W at 11 kts
Sea-level pressure: 30.56 inches Hg, rising
Visibility: 70 miles
6-hourly min. temp. 17 deg. 
BHO SA 1155 250 -SCT 70 350/17/6/2811/056/ FEW SC DSNT NE-SE/ 
8/101 53031 10021 20017
 
10 A.M.    
Weather: Overcast cirrostratus
Temperature: 25F, Dew point: 6F, Wind: W at 07 kts
Sea-level pressure: 30.62 inches Hg, rising  
Visibility: 70 miles  
BHO SA 1455 E250 OVC 70 370/25/6/2807/062/ BINOVC S-SW/ 8/007 53020
  
1 P.M.    
Weather: Scattered altocumulus, thin overcast cirrostratus 
Temperature: 31F, Dew point: 7F, Wind: SW at 06 kts
Sea-level pressure: 30.59 inches Hg, falling   
Visibility: 70 miles  
6-hourly max. temp: 31 deg. 
BHO SA 1755 200 SCT E250 –OVC 70 358/31/7/2206/059/ 8/057 58012 
10031 20017                    
 
WEATHER SUMMARY FOR WEDNESDAY, JANUARY 10 
 
TEMPERATURE (DEGREES F)
MAX.....34   NORMAL.....34 
MIN.....22   NORMAL.....18   
MEAN....28   NORMAL.....26
 
DEPARTURE FROM 30-YEAR NORMAL........+ 2
TOTAL DEPARTURE FOR THE MONTH.......+163 (+16.1 DEGREES/DAY) 
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY..........37   DEPARTURE......- 2
TOTAL HEATING UNITS FOR THE MONTH.........222   DEPARTURE.....-162 
TOTAL HEATING UNITS FOR THE SEASON.......2095   DEPARTURE.....-618
TOTAL HEATING UNITS LAST SEASON TO DATE..2491   DIFFERENCE....-396
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY...........48   W AT 12:38 P.M.                
                   AEROVANE............50   W AT 12:38 P.M.                        
                   ASOS................46   W AT 12:38 P.M.                      
                   DAVIS...............49 WSW AT 12:37 P.M.                 
FASTEST MILE FOR YESTERDAY.............35   W AT 11:53 A.M.     
MAXIMUM 2-MINUTE ASOS AVERAGE..........32   W AT 12:39 P.M.           
MAXIMUM 2-MINUTE DAVIS AVERAGE.........34   W AT 12:38 P.M.                
AVERAGE WIND SPEED AND DIRECTION.....17.5   W 
                   ASOS..............17.2          
                   DAVIS.............17.9   W [271 deg] 
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE......-0.15
                         ASOS..............0.00
TOTAL PRECIPITATION FOR THE MONTH..........1.77  DEPARTURE......+0.27 
                         ASOS..............1.78    
TOTAL PRECIPITATION FOR THE YEAR...........1.77  DEPARTURE......+0.27
                         ASOS..............1.78
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0   DEPARTURE.....-0.5
TOTAL SNOWFALL FOR THE MONTH................0.0   DEPARTURE.....-5.0
TOTAL SNOWFALL FOR THE SEASON...............3.7   DEPARTURE....-14.9
 
PRELIMINARY CLIMATE SUMMARY FOR JANUARY 2007......CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
 
AERO: Aerovane recording wind system when significant
TSTM: Thunderstorm day
....: Data not yet available
 
1/1  53/30/42/+15/0.98/0/000/00     38 SE 
1/2  43/31/37/+10/0.03/0/505/92     44 W    Aero 47 MPH W   
1/3  49/30/40/+13/0/0/435/79        40 S   
1/4  53/40/47/+20/0/0/198/36*       31 SSW
1/5  61/46/54/+27/0.04/0/000/00     44 S    Aero 44 MPH S
1/6  66/48/57/+31/0.03/0/161/29     48 SSW  Aero 47 MPH SSW 
1/7  50/38/44/+18/0/0/505/91        43 W    Aero 44 MPH W 
1/8  52/36/44/+18/0.69/0/000/00     45 W    Aero 45 MPH W 
1/9  41/29/35/+9/0/0/518/93         40 W    Aero 39 MPH W
1/10 34/22/28/+2/0/0/.../..         48 W
 
1/11 morning low temp. 17 deg; normal low now 18 deg. 
      
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR JANUARY 11
HIGH 59F IN 1975
LOW -7F IN 1968
PRECIP 1.14 INS. IN 1956
SNOW 10.2 INS. 1927
WIND 95e MPH S IN 1980
 
RECORDS FOR JANUARY 12
HIGH 57F IN 1913, 1975
LOW -15F IN 1886
PRECIP 1.46 INS. IN 1900
SNOW 6.0 INS. IN 1923
WIND 84e MPH S IN 1980
 
TODAY'S REPORT By: Stephanie Radner